#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QFileDialog>
#include <QMainWindow>
#include<canvass.h>
#include<QPushButton>
#include<QMessageBox>
namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);

     myQGV *aa;

private:
    Ui::MainWindow *ui;
private slots:void openfile();
};

#endif // MAINWINDOW_H
